hg: jdk/sandbox: 8221592: C2 compilation failed with assert(!q->is_MergeMem())

[chris.hegarty at oracle.com]

Changeset: 2f4393ec54d4
Author:    thartmann
Date:      2019-04-29 09:04 +0200
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/2f4393ec54d4

8221592: C2 compilation failed with assert(!q->is_MergeMem())
Summary: Transform the original MergeMem after transforming the slices to get rid of MergeMem inputs.
Reviewed-by: kvn, neliasso

! src/hotspot/share/opto/parse1.cpp